Explosives
is any chemical compound, mixture,
or device the primary or common
purpose of which is to function
by explosion.

Class
A Explosives detonating
or otherwise of maximum hazard.

Class
B Explosives in general,
function by rapid combustion
rather than detonation and include
some explosive devices such
as special fireworks, flash
powders, etc. Flammable hazard.

Class
C Explosives is certain
types of manufactured articles
containing Class A or Class
B explosives, or both, as components
but in restricted quantities,
and certain types of fireworks.
Minimum hazard.

Combustible
Liquid is any liquid having
a flash point at or above 100F
and below 200 F under the conditions
specified in Title 49, CFR.

Corrosive
Material is any liquid or
solid that causes destruction
of human skin tissue or a liquid
that has a severe corrosion
rate on steel.

Flammable
Liquid is any liquid having
a flash point below 100 F under
the condition specified in Title
49

Pyrophoric
Liquid Any liquid which
may ignite spontaneously when
exposed to air the temperature
of which is 55 C (130 F) or
below.

Compressed
Gas is any material or mixture
having in the container a pressure
exceeding 40 psia at 70 F or
104 psia at 130 F.

Nonflammable
Gas is any compressed gas
other than a flammable compressed
gas.

Flammable
Solids is any solid material,
other than explosive which is
liable to cause fires through
friction, absorption of moisture,
spontaneous chemical changes,
retained heat from manufacturing
or processing, or which can
be ignited readily and when
ignited burns so vigorously
and persistently as to create
a serious transportation hazard.

Organic
Peroxide is an organic compound
containing the vivalent -0-0-
structure and which may be considered
a derivative of hydrogen peroxide
where one or more of the hydrogen
atoms have been replaced by
organic radicals must be classed
as an organic peroxide.

Oxidizer
is a substance such as chlorate,
permanganate, inorganic peroxide,
notro carbo nitrate, or a nitrate,
that yields oxygen readily to
stimulate the combustion of
organic matter.

Poison
A is extremely dangerous
poisonous gases or liquids of
such nature that a very small
amount, mixed with air, is dangerous
to life.

Poison
B is less dangerous poisons.
Substances, liquids or solids
(including pastes and semi-solid)
other than Class A or irritating
materials which are known to
be so toxic to man as to afford
a hazard to health during transportation,
or which, in the absence of
adequate data on human toxicity,
are presumed to be toxic to
man based on results with test
animals.

Irritating
Materials is liquid or solid
substances, which, upon contact
with fire or when exposed to
air, give off dangerous or intensely
irritating fumes, but not including
any poisonous material, Class
A.

Etiologic
Agent is an etiologic agent
means a viable micro-organism,
or its toxin, which causes or
may cause human disease (Sec.
173.386 Refer to the Department
of Health, Education and Welfare
Regulations, Title 42, CFR).

Radioactive
Material is any material
or combination or materials,
that spontaneously emits ionizing
radiation and has a specific
gravity greater than 0.002 microcuries
per gram.

ORM-A,
B or C (Other Regulated Materials)Any
material that does not meet
the definition of a hazardous
material, other than combustible
liquid in packaging having a
capacity of 110 gallons or less,
and is specified in Sec. 172.101
as an ORM material or that possesses
one or more of the characteristics
described in ORM-A through D
below (Sec. 173.500) Note: an
ORM with a flash point of 100
F to 200 F, when transported
with more than 110 gallons in
one container shall be classed
as a combustible liquid.

ORM-A
is a material which has an anesthetic,
irritating, noxious, toxic or
other similar property and which
can cause extreme annoyance
or discomfort to passengers
and crew in the event of leakage
during transportation.

ORM-B
is a material (including a solid
when wet with water) capable
of causing significant damage
to a transport vehicle or vessel
from leakage during transportation.
Materials meeting one or both
of the following criteria are
ORM-B materials: (1) A liquid
substance that has corrosion
rate exceeding 0.250 inch per
year (IPY) on aluminum (nonclad
7075-T6) at a test temperature
of 130 F. An acceptable test
is described in NACE Standard
TM-01-69, and (2) specifically
designated by name in Sec. 172.101
of the subchapter.

ORM-C
is a material which has other
inherent characteristics not
described as an ORM-A or ORM-B
but which makes it unsuitable
for shipment, unless properly
identified and prepared for
transportation.

ORM-D
is a material such as a consumer
commodity which, through otherwise
subject to the regulations of
the subchapter, presents a limited
hazard during transportation
due to its form, quantity and
packaging.